Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
tay lang » tai lang, tay tang, tay quang
vat dung » van dung, va dung, viet dung
tu sach » thu sach, su sach, te sach
van hoi » van hoc, van hoe, van loi
hieu va » lieu va, hieu qua
cac tac » cac toc, cac bac, cac dac
tac vat » tap vat, tac va, tao vat
cuc te » cua te, cuc thue, cuc tieu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tay lang ((van hoi) OR (van hoa)). hieu va cac tac vat dung tai cuc te~.
• Adding a wildcard symbol may retrieve word variants: tu sach tay lang ((van hoi) or (van hoa)). hieu va cac tac vat dung tai cuc te*.